Material recognition device and material recognition method
AssigneePixart Imaging Inc.
InventorsWei-Chung WANG, Chih-Ming SUN
Life of this patent
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Abstract
There is provided a surface material recognition device including a light source, a first photodiode, a second photodiode and a processor. The light source is used to illuminate a working surface. The first photodiode has a first detection wavelength range, and is used to output a first detection signal having first detection intensity. The second photodiode has a second detection wavelength range, different from the first detection wavelength range, and is used to output a second detection signal having second detection intensity. The processor recognizes a material of the working surface according to a combination of the first detection intensity and the second detection intensity.
Claims20
A material recognition device, comprising:
- a light source, configured to illuminate a working surface;
- a first photodiode, having a first detection wavelength range, and configured to output a first detection signal having first detection intensity;
- a second photodiode, having a second detection wavelength range, different from the first detection wavelength range, and configured to output a second detection signal having second detection intensity;
- and
- a processor, configured to recognize a material of the working surface according to a combination of the first detection intensity and the second detection intensity.
A material recognition device, comprising:
- a light source, configured to illuminate a working surface;
- multiple photodiodes, arranged at a side of the light source in a first direction and forming a one-dimensional array in a second direction perpendicular to the first direction, wherein the multiple photodiodes respectively have a predetermined detection wavelength range different from one another and is configured to output a detection signal having detection intensity;
- and
- a processor, configured to recognize a material of the working surface according to a combination of multiple detection intensity of the multiple photodiodes.
A material recognition method of a material recognition device, the material recognition device comprising a light source, multiple photodiodes and a processor, the material recognition method comprising:
- lighting the light source to illuminate a working surface;
- detecting, by the multiple photodiodes, reflected light from the working surface to output multiple detection signals having multiple detection intensity associated with multiple light wavelength ranges;
- and
- recognizing, by the processor, a material of the working surface according to a combination of the multiple detection intensity.
Dependencies are inferred from the claim text.